Air Compressor Drive Contactors
GE/WABTEC Locomotives
The existing air compressor drive contactors are undersized for the load encountered and are a significant cause of road failures.
Existing OEM Contactor
- NEMA Size 3
- Manufacturer Rating: 130 amps
- AC-3 Rating: 90 amps
- Surge Rating:800 amps
RSA Contactor
- NEMA Size 4
- Manufacturer Rating:230 amps
- AC-3 Rating: 180 amps
- Surge Rating:1800 amps
Relay Systems offers a highly reliable, direct replacement upgrade which eliminates this failure mode.
Kits are available for EVO, AC4400,DASH-9, and DASH-8 locomotives
Over 4,000 locomotives have been upgraded with the RSA kit.
Contactor available as GE/Wabtec part number 84A207944P11.
Kits are available for EVO, AC4400,DASH-9, and DASH-8 locomotives
Over 4,000 locomotives have been upgraded with the RSA kit.
Contactor available as GE/Wabtec part number 84A207944P11.
EMD Locomotives
The original motor driven air compressor contactor is undersized for the actual loads encountered
Measurements taken on a 70 Series locomotive illustrate why a high rate of contactor failures occur:
- Measured continuous current– 429 amps
- Existing contactor continuous rating – 270 amps
Air Compressor Contactor Ratings Original Installation vs. RSA Upgrade
Existing OEM Contactor
- NEMA Size 5
- Manufacturer Rating: 325 amps
- AC-3 Rating: 270 amps
- Surge Rating:2700 amps
RSA Contactor
- NEMA Size 6
- Manufacturer Rating:540 amps
- AC-3 Rating: 460 amps
- Surge Rating:4600 amps
Relay Systems offers a complete retrofit kit which includes all components required to convert your air compressor drive contactors into a reliable system.
